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<p><strong>&#x9759;&#x6001;&#x5DE5;&#x5382;&#x65B9;&#x6CD5;&#x7684;&#x4E00;&#x4E2A;&#x4F18;&#x70B9;&#x662F;&#xFF0C;&#x5B83;&#x4EEC;&#x662F;&#x6709;&#x540D;&#x79F0;&#x7684;&#xFF0C;&#x800C;&#x6784;&#x9020;&#x51FD;&#x6570;&#x7684;&#x540D;&#x79F0;&#x90FD;&#x662F;&#x4E00;&#x6837;&#x7684;</strong>&#x3002;&#x4E00;&#x4E2A;&#x7C7B;&#x53EF;&#x4EE5;&#x6709;&#x591A;&#x4E2A;&#x4E0D;&#x540C;&#x53C2;&#x7684;&#x6784;&#x9020;&#x51FD;&#x6570;&#xFF0C;&#x4E5F;&#x6709;&#x53EF;&#x80FD;&#x6784;&#x9020;&#x51FD;&#x6570;&#x7684;&#x53C2;&#x6570;&#x5217;&#x8868;&#x53EA;&#x5728;&#x53C2;&#x6570;&#x7C7B;&#x578B;&#x7684;&#x987A;&#x5E8F;&#x4E0A;&#x6709;&#x6240;&#x4E0D;&#x540C;&#x3002;&#x8FD9;&#x6837;&#x4F7F;&#x7528;&#x8FD9;&#x4E2A; API &#x7684;&#x7528;&#x6237;&#x6C38;&#x8FDC;&#x65E0;&#x6CD5;&#x8BB0;&#x4F4F;&#x5E94;&#x8BE5;&#x4F7F;&#x7528;&#x54EA;&#x4E2A;&#x6784;&#x9020;&#x51FD;&#x6570;&#xFF0C;&#x5E76;&#x4E14;&#x6700;&#x7EC8;&#x4F1A;&#x8C03;&#x7528;&#x9519;&#x8BEF;&#x7684;&#x6784;&#x9020;&#x51FD;&#x6570;&#x3002;&#x4F7F;&#x7528;&#x8FD9;&#x4E9B;&#x6784;&#x9020;&#x51FD;&#x6570;&#x7684;&#x4EBA;&#x5728;&#x4E0D;&#x9605;&#x8BFB;&#x5F15;&#x7528;&#x7C7B;&#x6587;&#x6863;&#x7684;&#x60C5;&#x51B5;&#x4E0B;&#x662F;&#x4E0D;&#x77E5;&#x9053;&#x4EE3;&#x7801;&#x662F;&#x5E72;&#x4EC0;&#x4E48;&#x7684;&#x3002;</p>
<p>&#x800C;&#x9759;&#x6001;&#x5DE5;&#x5382;&#x65B9;&#x6CD5;&#x6709;&#x540D;&#x79F0;&#xFF0C;&#x6240;&#x4EE5;&#x5C31;&#x4E0D;&#x4F1A;&#x6709;&#x8FD9;&#x4E2A;&#x9650;&#x5236;&#xFF0C;&#x5728;&#x4E00;&#x4E2A;&#x7C7B;&#x9700;&#x8981;&#x4F7F;&#x7528;&#x591A;&#x4E2A;&#x7B7E;&#x540D;&#x3001;&#x591A;&#x4E2A;&#x6784;&#x9020;&#x51FD;&#x6570;&#x7684;&#x60C5;&#x51B5;&#x4E0B;&#xFF0C;&#x7528;&#x9759;&#x6001;&#x5DE5;&#x5382;&#x65B9;&#x6CD5;&#x4EE3;&#x66FF;&#x6784;&#x9020;&#x51FD;&#x6570;&#xFF0C;&#x5E76;&#x4ED4;&#x7EC6;&#x9009;&#x62E9;&#x65B9;&#x6CD5;&#x7684;&#x540D;&#x79F0;&#x5C31;&#x53EF;&#x4EE5;&#x7A81;&#x51FA;&#x6784;&#x9020;&#x51FD;&#x6570;&#x4E4B;&#x95F4;&#x7684;&#x5DEE;&#x5F02;&#x4E86;&#x3002;&#x5982;<code>BigInteger.probablePrime</code>&#x5C31;&#x53EF;&#x4EE5;&#x77E5;&#x9053;&#x662F;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;&#x8D28;&#x6570;&#x7684;&#x65B9;&#x6CD5;&#x3002;</p>
<p><strong>&#x9759;&#x6001;&#x5DE5;&#x5382;&#x65B9;&#x6CD5;&#x7684;&#x7B2C;&#x4E8C;&#x4E2A;&#x4F18;&#x70B9;&#x662F;&#xFF0C;&#x4E0E;&#x6784;&#x9020;&#x51FD;&#x6570;&#x4E0D;&#x540C;&#xFF0C;&#x5B83;&#x4EEC;&#x4E0D;&#x9700;&#x8981;&#x5728;&#x6BCF;&#x6B21;&#x88AB;&#x8C03;&#x7528;&#x65F6;&#x521B;&#x5EFA;&#x4E00;&#x4E2A;&#x65B0;&#x5BF9;&#x8C61;</strong>&#x3002;&#x8FD9;&#x5141;&#x8BB8;&#x4E0D;&#x53EF;&#x53D8;&#x7C7B;&#xFF08;&#x7B2C; 17 &#x9879;&#xFF09;&#x4F7F;&#x7528;&#x9884;&#x5148;&#x6784;&#x9020;&#x7684;&#x5B9E;&#x4F8B;&#xFF0C;&#x6216;&#x8005;&#x5728;&#x6784;&#x5EFA;&#x65F6;&#x7F13;&#x5B58;&#x5B9E;&#x4F8B;&#xFF0C;&#x5E76;&#x91CD;&#x590D;&#x5206;&#x53D1;&#x5B83;&#x4EEC;&#xFF0C;&#x4EE5;&#x907F;&#x514D;&#x521B;&#x5EFA;&#x4E0D;&#x5FC5;&#x8981;&#x7684;&#x91CD;&#x590D;&#x5BF9;&#x8C61;&#x3002;<code>Boolean.valueOf(boolean)</code>&#x65B9;&#x6CD5;&#x4F7F;&#x7528;&#x4E86;&#x8FD9;&#x79CD;&#x65B9;&#x5F0F;&#xFF1A;&#x5B83;&#x4ECE;&#x4E0D;&#x521B;&#x5EFA;&#x5BF9;&#x8C61;&#x3002;&#x8FD9;&#x79CD;&#x6280;&#x672F;&#x7C7B;&#x4F3C;&#x4E8E;<u>&#x4EAB;&#x5143;&#x6A21;&#x5F0F;</u>&#x3002;&#x5982;&#x679C;&#x7ECF;&#x5E38;&#x8BF7;&#x6C42;&#x7B49;&#x6548;&#x5BF9;&#x8C61;&#xFF0C;&#x7279;&#x522B;&#x662F;&#x5F53;&#x5B83;&#x4EEC;&#x7684;&#x521B;&#x5EFA;&#x6210;&#x672C;&#x5F88;&#x9AD8;&#x65F6;&#xFF0C;&#x5B83;&#x53EF;&#x4EE5;&#x6781;&#x5927;&#x5730;&#x63D0;&#x9AD8;&#x6027;&#x80FD;&#x3002;</p>
<blockquote>
<p>&#x4EAB;&#x5143;&#x6A21;&#x5F0F;&#xFF1A;&#x4E3B;&#x8981;&#x7528;&#x4E8E;&#x51CF;&#x5C11;&#x521B;&#x5EFA;&#x5BF9;&#x8C61;&#x7684;&#x6570;&#x91CF;&#xFF0C;&#x4EE5;&#x51CF;&#x5C11;&#x5185;&#x5B58;&#x5360;&#x7528;&#x548C;&#x63D0;&#x9AD8;&#x6027;&#x80FD;&#x3002;&#x8FD9;&#x79CD;&#x7C7B;&#x578B;&#x7684;&#x8BBE;&#x8BA1;&#x6A21;&#x5F0F;&#x5C5E;&#x4E8E;&#x7ED3;&#x6784;&#x578B;&#x6A21;&#x5F0F;&#xFF0C;&#x5B83;&#x63D0;&#x4F9B;&#x4E86;&#x51CF;&#x5C11;&#x5BF9;&#x8C61;&#x6570;&#x91CF;&#x4ECE;&#x800C;&#x6539;&#x5584;&#x5E94;&#x7528;&#x6240;&#x9700;&#x7684;&#x5BF9;&#x8C61;&#x7ED3;&#x6784;&#x7684;&#x65B9;&#x5F0F;&#x3002;</p>
</blockquote>
<p><strong>&#x9759;&#x6001;&#x5DE5;&#x5382;&#x65B9;&#x6CD5;&#x7684;&#x7B2C;&#x4E09;&#x4E2A;&#x4F18;&#x70B9;&#x662F;&#xFF0C;&#x4E0E;&#x6784;&#x9020;&#x51FD;&#x6570;&#x4E0D;&#x540C;&#xFF0C;&#x5B83;&#x4EEC;&#x8FD4;&#x56DE;&#x7684;&#x5BF9;&#x8C61;&#x53EF;&#x4EE5;&#x662F;&#x8FD4;&#x56DE;&#x7C7B;&#x578B;&#x7684;&#x4EFB;&#x4F55;&#x5B50;&#x7C7B;&#x7684;&#x5B9E;&#x4F8B;&#x5BF9;&#x8C61;</strong>&#x3002;&#x5728; Java 8 &#x4E4B;&#x524D;&#xFF0C;&#x63A5;&#x53E3;&#x4E0D;&#x80FD;&#x6709;&#x9759;&#x6001;&#x65B9;&#x6CD5;&#x3002;&#x4ECE; Java 8 &#x5F00;&#x59CB;&#xFF0C;&#x6D88;&#x9664;&#x4E86;&#x63A5;&#x53E3;&#x4E0D;&#x80FD;&#x5305;&#x542B;&#x9759;&#x6001;&#x65B9;&#x6CD5;&#x7684;&#x9650;&#x5236;&#xFF0C;&#x56E0;&#x6B64;&#x901A;&#x5E38;&#x6CA1;&#x6709;&#x7406;&#x7531;&#x4E3A;&#x63A5;&#x53E3;&#x63D0;&#x4F9B;&#x4E0D;&#x53EF;&#x5B9E;&#x4F8B;&#x5316;&#x7684;&#x4F34;&#x968F;&#x7C7B;&#x3002;&#x8BB8;&#x591A;&#x516C;&#x5171;&#x9759;&#x6001;&#x6210;&#x5458;&#x5E94;&#x8BE5;&#x653E;&#x5728;&#x63A5;&#x53E3;&#x672C;&#x8EAB;&#x4E2D;&#x3002;&#x4F46;&#x8BF7;&#x6CE8;&#x610F;&#xFF0C;&#x53EF;&#x80FD;&#x4ECD;&#x6709;&#x5FC5;&#x8981;&#x5C06;&#x5927;&#x91CF;&#x5B9E;&#x73B0;&#x4EE3;&#x7801;&#x653E;&#x5728;&#x8FD9;&#x4E9B;&#x9759;&#x6001;&#x65B9;&#x6CD5;&#x540E;&#x9762;&#x7684;&#x5355;&#x72EC;&#x7684;&#x5305;&#x79C1;&#x6709;&#x7C7B;&#x4E2D;&#x3002;&#x8FD9;&#x662F;&#x56E0;&#x4E3A; Java 8 &#x8981;&#x6C42;&#x63A5;&#x53E3;&#x7684;&#x6240;&#x6709;&#x9759;&#x6001;&#x6210;&#x5458;&#x90FD;&#x662F;&#x516C;&#x5171;&#x7684;&#x3002;Java 9 &#x5141;&#x8BB8;&#x79C1;&#x6709;&#x9759;&#x6001;&#x65B9;&#x6CD5;&#xFF0C;&#x4F46;&#x9759;&#x6001;&#x5B57;&#x6BB5;&#x548C;&#x9759;&#x6001;&#x6210;&#x5458;&#x7C7B;&#x7684;&#x5C5E;&#x6027;&#x4F9D;&#x7136;&#x662F;&#x8981;&#x6C42;&#x662F;&#x516C;&#x5171;&#x7684;&#x3002;</p>
<p><strong>&#x9759;&#x6001;&#x5DE5;&#x5382;&#x65B9;&#x6CD5;&#x7684;&#x7B2C;&#x56DB;&#x4E2A;&#x4F18;&#x70B9;&#x662F;&#xFF0C;&#x9759;&#x6001;&#x5DE5;&#x5382;&#x65B9;&#x6CD5;&#x6240;&#x8FD4;&#x56DE;&#x7684;&#x5BF9;&#x8C61;&#x7684;&#x7C7B;&#x53EF;&#x4EE5;&#x968F;&#x7740;&#x6BCF;&#x6B21;&#x8C03;&#x7528;&#x800C;&#x53D8;&#x5316;&#xFF0C;&#x8FD9;&#x53D6;&#x51B3;&#x4E8E;&#x9759;&#x6001;&#x5DE5;&#x5382;&#x65B9;&#x6CD5;&#x7684;&#x53C2;&#x6570;&#x503C;</strong>&#x3002;&#x53EA;&#x8981;&#x8FD4;&#x56DE;&#x7684;&#x7C7B;&#x578B;&#x662F;&#x58F0;&#x660E;&#x7684;&#x7C7B;&#x7684;&#x5B50;&#x7C7B;&#x90FD;&#x662F;&#x5141;&#x8BB8;&#x7684;&#x3002;&#x8FD4;&#x56DE;&#x5BF9;&#x8C61;&#x7684;&#x7C7B;&#x4E5F;&#x53EF;&#x80FD;&#x968F;&#x7740;&#x53D1;&#x884C;&#x7248;&#x672C;&#x7684;&#x4E0D;&#x540C;&#x800C;&#x4E0D;&#x540C;&#x3002;&#x5728;<code>EnumSet</code>&#x7C7B;&#xFF08;&#x7B2C; 36 &#x9879;&#xFF09;&#x4E2D;&#x6CA1;&#x6709;&#x516C;&#x6709;&#x7684;&#x6784;&#x9020;&#x65B9;&#x6CD5;&#xFF0C;&#x53EA;&#x6709;&#x9759;&#x6001;&#x5DE5;&#x5382;&#x65B9;&#x6CD5;&#x3002;&#x5728; OpenJDK &#x5B9E;&#x73B0;&#x4E2D;&#x7684;&#xFF0C;&#x5B83;&#x4EEC;&#x8FD4;&#x56DE;&#x4E24;&#x4E2A;&#x5B50;&#x7C7B;&#x4E4B;&#x4E00;&#x7684;&#x5B9E;&#x4F8B;&#xFF0C;&#x5177;&#x4F53;&#x53D6;&#x51B3;&#x4E8E;&#x57FA;&#x7840;&#x679A;&#x4E3E;&#x7C7B;&#x578B;&#x7684;&#x5927;&#x5C0F;&#xFF1A;&#x5982;&#x679C;&#x5B83;&#x6709; 64 &#x4E2A;&#x6216;&#x66F4;&#x5C11;&#x7684;&#x5143;&#x7D20;&#xFF0C;&#x5C31;&#x50CF;&#x5927;&#x591A;&#x6570;&#x679A;&#x4E3E;&#x7C7B;&#x578B;&#x6240;&#x505A;&#x7684;&#x90A3;&#x6837;&#xFF0C;&#x9759;&#x6001;&#x5DE5;&#x5382;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;<code>RegularEnumSet</code>&#x5B9E;&#x4F8B;, &#x5B83;&#x7531;&#x5355;&#x4E2A;<code>long</code>&#x7684;&#x652F;&#x6301;&#xFF1B;&#x5982;&#x679C;&#x679A;&#x4E3E;&#x7C7B;&#x578B;&#x6709; 65 &#x4E2A;&#x6216;&#x66F4;&#x591A;&#x5143;&#x7D20;&#xFF0C;&#x5219;&#x5DE5;&#x5382;&#x5C06;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;&#x7531;&#x957F;&#x6570;&#x7EC4;&#x652F;&#x6301;&#x7684;<code>JumboEnumSet</code>&#x5B9E;&#x4F8B;&#x3002;</p>
<p><strong>&#x9759;&#x6001;&#x5DE5;&#x5382;&#x65B9;&#x6CD5;&#x7684;&#x7B2C;&#x4E94;&#x4E2A;&#x4F18;&#x70B9;&#x662F;&#xFF0C;&#x8FD4;&#x56DE;&#x7684;&#x5BF9;&#x8C61;&#x6240;&#x5C5E;&#x7684;&#x7C7B;&#xFF0C;&#x5728;&#x7F16;&#x5199;&#x5305;&#x542B;&#x8BE5;&#x9759;&#x6001;&#x5DE5;&#x5382;&#x65B9;&#x6CD5;&#x7684;&#x7C7B;&#x65F6;&#x53EF;&#x4EE5;&#x4E0D;&#x5FC5;&#x5B58;&#x5728;</strong>&#x3002;&#x8FD9;&#x79CD;&#x7075;&#x6D3B;&#x7684;&#x9759;&#x6001;&#x5DE5;&#x5382;&#x65B9;&#x6CD5;&#x6784;&#x6210;&#x4E86;&#x670D;&#x52A1;&#x63D0;&#x4F9B;&#x8005;&#x6846;&#x67B6;(Service Provider Framework)&#x7684;&#x57FA;&#x7840;&#xFF0C;&#x4F8B;&#x5982; JDBC(Java &#x6570;&#x636E;&#x5E93;&#x8FDE;&#x63A5;&#xFF0C;Java Database Connectivity)API&#x3002;&#x670D;&#x52A1;&#x63D0;&#x4F9B;&#x8005;&#x6846;&#x67B6;&#x662F;&#x63D0;&#x4F9B;&#x8005;&#x5B9E;&#x73B0;&#x670D;&#x52A1;&#x7684;&#x7CFB;&#x7EDF;&#xFF0C;&#x7CFB;&#x7EDF;&#x4F7F;&#x5B9E;&#x73B0;&#x53EF;&#x7528;&#x4E8E;&#x5BA2;&#x6237;&#x7AEF;&#xFF0C;&#x5C06;&#x5BA2;&#x6237;&#x7AEF;&#x4E0E;&#x5B9E;&#x73B0;&#x5206;&#x79BB;&#x3010;&#x5FAE;&#x670D;&#x52A1;&#x3011;&#x3002;</p>
<p>&#x9759;&#x6001;&#x5DE5;&#x5382;&#x4E3B;&#x8981;&#x7F3A;&#x70B9;&#x4E3A;&#xFF0C;&#x7C7B;&#x5982;&#x679C;&#x4E0D;&#x5305;&#x542B;&#x516C;&#x6709;&#x7684;&#x6216;&#x8005;&#x53D7;&#x4FDD;&#x62A4;&#x7684;&#x6784;&#x9020;&#x5668;&#xFF0C;&#x5C31;&#x4E0D;&#x80FD;&#x88AB;&#x5B50;&#x7C7B;&#x5316;&#x3002;</p>
<h3 id="&#x9047;&#x5230;&#x591A;&#x4E2A;&#x6784;&#x9020;&#x5668;&#x53C2;&#x6570;&#x65F6;&#x8981;&#x8003;&#x8651;&#x4F7F;&#x7528;&#x6784;&#x5EFA;&#x5668;"><a name="&#x9047;&#x5230;&#x591A;&#x4E2A;&#x6784;&#x9020;&#x5668;&#x53C2;&#x6570;&#x65F6;&#x8981;&#x8003;&#x8651;&#x4F7F;&#x7528;&#x6784;&#x5EFA;&#x5668;" class="plugin-anchor" href="#&#x9047;&#x5230;&#x591A;&#x4E2A;&#x6784;&#x9020;&#x5668;&#x53C2;&#x6570;&#x65F6;&#x8981;&#x8003;&#x8651;&#x4F7F;&#x7528;&#x6784;&#x5EFA;&#x5668;"><i class="fa fa-link" aria-hidden="true"></i></a>&#x9047;&#x5230;&#x591A;&#x4E2A;&#x6784;&#x9020;&#x5668;&#x53C2;&#x6570;&#x65F6;&#x8981;&#x8003;&#x8651;&#x4F7F;&#x7528;&#x6784;&#x5EFA;&#x5668;</h3>
<p>&#x91CD;&#x53E0;&#x6784;&#x9020;&#x5668;&#x6A21;&#x5F0F;&#x53EF;&#x884C;&#xFF0C;&#x4F46;&#x662F;&#x5F53;&#x53C2;&#x6570;&#x592A;&#x591A;&#x65F6;&#xFF0C;&#x4EE3;&#x7801;&#x5197;&#x4F59;&#x5EA6;&#x6781;&#x9AD8;&#x3002;</p>
<pre><code class="lang-java"><span class="hljs-keyword">public</span> <span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">Clz</span></span>{
    <span class="hljs-keyword">private</span> <span class="hljs-keyword">int</span> a;
    <span class="hljs-keyword">private</span> <span class="hljs-keyword">int</span> b;
    <span class="hljs-keyword">private</span> <span class="hljs-keyword">int</span> c;
    <span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-title">Clz</span><span class="hljs-params">()</span></span>{}
    <span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-title">Clz</span><span class="hljs-params">(<span class="hljs-keyword">int</span> a,<span class="hljs-keyword">int</span> b)</span></span>{
        <span class="hljs-keyword">this</span>(a,b,<span class="hljs-number">0</span>);
    }
    <span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-title">Clz</span><span class="hljs-params">(<span class="hljs-keyword">int</span> a,<span class="hljs-keyword">int</span> b,<span class="hljs-keyword">int</span> c)</span></span>{
        <span class="hljs-keyword">this</span>.a = a;
        <span class="hljs-keyword">this</span>.b = b;
        <span class="hljs-keyword">this</span>.c = c;
    }
}
</code></pre>
<p>javaBean&#x5F62;&#x5F0F;&#xFF0C;&#x6784;&#x9020;&#x8FC7;&#x7A0B;&#x4E2D;&#x53EF;&#x80FD;&#x4EA7;&#x751F;&#x4E0D;&#x4E00;&#x81F4;&#x7684;javaBean&#x72B6;&#x6001;</p>
<pre><code class="lang-java"><span class="hljs-keyword">public</span> <span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">Clz</span></span>{
    <span class="hljs-keyword">private</span> <span class="hljs-keyword">int</span> a;
    <span class="hljs-keyword">private</span> <span class="hljs-keyword">int</span> b;
    <span class="hljs-keyword">private</span> <span class="hljs-keyword">int</span> c;
    <span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-title">Clz</span><span class="hljs-params">()</span></span>{}
    <span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title">setA</span><span class="hljs-params">(<span class="hljs-keyword">int</span> a)</span></span>{
        <span class="hljs-keyword">this</span>.a = a;
    }
    <span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title">setB</span><span class="hljs-params">(<span class="hljs-keyword">int</span> b)</span></span>{
        <span class="hljs-keyword">this</span>.b = b;
    }
    <span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title">setC</span><span class="hljs-params">(<span class="hljs-keyword">int</span> c)</span></span>{
        <span class="hljs-keyword">this</span>.c = c;
    }
}
</code></pre>
<p>&#x6784;&#x5EFA;&#x5668;</p>
<pre><code class="lang-java"><span class="hljs-keyword">public</span> <span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">Clz</span></span>{
    <span class="hljs-keyword">private</span> <span class="hljs-keyword">final</span> <span class="hljs-keyword">int</span> a;
    <span class="hljs-keyword">private</span> <span class="hljs-keyword">final</span> <span class="hljs-keyword">int</span> b;
    <span class="hljs-keyword">private</span> <span class="hljs-keyword">final</span> <span class="hljs-keyword">int</span> c;
  <span class="hljs-keyword">private</span> <span class="hljs-keyword">final</span> <span class="hljs-keyword">int</span> d;
    <span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-title">Clz</span><span class="hljs-params">(Builder build)</span></span>{
    a = build.a;
    b = build.b;
    c = build.c;
    d = build.c;
  }

  <span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> <span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">Builder</span></span>{
    <span class="hljs-comment">//&#x5FC5;&#x8F93;&#x53C2;&#x6570;</span>
    <span class="hljs-keyword">private</span> <span class="hljs-keyword">final</span> <span class="hljs-keyword">int</span> a;
    <span class="hljs-keyword">private</span> <span class="hljs-keyword">final</span> <span class="hljs-keyword">int</span> b;
    <span class="hljs-comment">//&#x975E;&#x5FC5;&#x8F93;&#x53C2;&#x6570;,&#x8D4B;&#x9ED8;&#x8BA4;&#x503C;</span>
    <span class="hljs-keyword">private</span> <span class="hljs-keyword">int</span> c = <span class="hljs-number">0</span>;
    <span class="hljs-keyword">private</span> <span class="hljs-keyword">int</span> d = <span class="hljs-number">0</span>;

    <span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-title">Builder</span><span class="hljs-params">(<span class="hljs-keyword">int</span> a,<span class="hljs-keyword">int</span> b)</span></span>{
      <span class="hljs-keyword">this</span>.a = a;
      <span class="hljs-keyword">this</span>.b = b;
    }

    <span class="hljs-function"><span class="hljs-keyword">public</span> Clz <span class="hljs-title">build</span><span class="hljs-params">()</span></span>{
      <span class="hljs-keyword">return</span> <span class="hljs-keyword">new</span> Clz(<span class="hljs-keyword">this</span>);
    }

    <span class="hljs-function">pubilc Builder <span class="hljs-title">c</span> <span class="hljs-params">(<span class="hljs-keyword">int</span> c)</span></span>{
      <span class="hljs-keyword">this</span>.c = c;
      <span class="hljs-keyword">return</span> <span class="hljs-keyword">this</span>;
    }

    <span class="hljs-function">pubilc Builder <span class="hljs-title">d</span> <span class="hljs-params">(<span class="hljs-keyword">int</span> d)</span></span>{
      <span class="hljs-keyword">this</span>.d = d;
      <span class="hljs-keyword">return</span> <span class="hljs-keyword">this</span>;
    }
  }

}
</code></pre>
<p>&#x4F7F;&#x7528;&#x6784;&#x5EFA;&#x5668;&#x5B9E;&#x4F8B;&#x5316;</p>
<pre><code>Clz clz = new Clz.Build(100,200).c(30).d(22).build();
</code></pre><p>Builder&#x6A21;&#x5F0F;&#x4E5F;&#x9002;&#x7528;&#x4E8E;&#x7C7B;&#x5C42;&#x6B21;&#x7ED3;&#x6784;&#x3002;</p>
<pre><code>public abstract class Pizza{
    public enum class Pizza{

    }
}
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